Improved sad-iron heater



J. J. JOHNSTON.

Sad-Iron Heater.

Patented Oct. 1. 1867.

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JAMES J. JOHNSTON, OF ALLEGHENY CITY, PENNSYLVANIA.

Letters Patent No. 69,347, elated October 1, 1867. I

IMPROVED. SAD-IRON HEATER.

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To ALL .wHoM IT MAY CONCERN:

Be it known that-I, JAMES J. JOHNSTON, of the city and county of Allegheny, and State of Pennsylvania, have invented a new and useful improvement in $moothing-Irons, and I do hereby declare the following to be a full and exact description thereof, reference being bad to the accompanying drawings, and to the letters of reference marked thereon.

My invention consists in providing box sn'ioothing-irons" with a grated heater, the bottom'of which is corrugated; and also in making the inside of the face or bottom of thebox or body of the smoothing-iron corrugated, said corrugations being so arranged that the convexities of the heater shall fit into the concavities on the inside face or bottom of the box or body of the smoothing-iron, and vice versa, the whole constructed, arranged, and operating in the manner hereinafter described.

To enable others skilled in the art to make anduse my invention, I will proceed to describe its construction and operation. In the accompanying drawings- Figure 1 represents a perspective view of my improved smoothing-iron.

Figure 2 represents a longitudinal section of the same.

Figure 3 represents a perspective view of the grated heater, the bottom of which is corrugated.

Figure 4 represents a hook, which is used for handling the heater.

In the drawings, A represents the box or body of the smoothing-iron; G represents the handle, which is made of wood, and is secured to pedestals e, which are cast with the lid, by a rod, h. The lid B is secured to the body or box A of theiron at the point, by means of a dove-tail, m, and the back end by means ofa lug on the under side of the lid marked 4, and a pin marked 1, which passes through the end of body or box A, near the top edge, into and through the lug 4. The back end of the lid may be secured to the body A by means of a spring and lover attached to the back pedestal e, as indicated by the dotted lines marked x, said lever being provided with a projecting and tapering pin, which pin, lever and spring will supply the place of the pin marked 4, and perhaps be much more convenient and more easily operated. This arrangement of pin, lever, and spring, represented by dotted lines so, will be readily understood by the skillful mechanic without further description. f reprcsents the grated heater, the bottom of which is corrugated, which corrugations are fitted to the corrugations on the inside of the face or bottom of the body or box A, as shown in fig. 2, in which it will be observed that the convcxities on the bottom side of the heater run longitudinally with, and on the transverse bars of said heater, and that said convexities fit into'concavities 0, made on the inside face or bottom of the body or box A, and that the convexities z'of said face or bottom run up between the transverse bars of the heatcrf. The heater fis cut away at the point marked 3, to make room for the dove-tail m of lid 13, and has a concavity in the back end marked 2, to make room for. thelug druid pin 1. The bar 9 of the heater is used for the purpose of handling it by a. hook similar to that represented in fig. 4. This bar 9 only extends down about hal the depth of the heater, so as to allow the hook with ease to take-hold of and let goof the heater when handling it.

The operation of my improved smoothing-iron is as follows: The heater is placed on the fire, which fire may be in a common fire-place, grate, range, stove, or charcoal-furnace, and the heat and flame will pass up between the bars of the heater, and readily heat it without any tendency to smother down the fire. When the heater is sufficiently hot, it is removed from the fire and placed in the box or body A of the iron, and the lid B is secured on and to the body or box A by the means already described. The iron is then let stand for afew moments, after which it will be ready for use.

The advantages of my improvement are as follows:

First. The conducting-surface of the inside face or bottom of the box or body A is greatly increased by making it corrugated.

Second. The heating power of the heaterf is greatly increased by making the bottom surface of said heater corrugated, and so'arranging the corrugation of the heater that the convex portions of its bottom surface will come into the concave portions of the inside face or bottom of the box or body A, thereby greatly increasing the radiating force of one and extending the conductive power of the other, two things that are essential in box-irons.

Third. Preventing undue expansion of the heater by combining the corrugated surface of its bottom with the grated form of heater, for, by the increase of heating surf'ztcc, the more easily, evenly, and imam-"tn will the whole body of the heater become heated, which evcnness' and uniformity of heating, and like manner of cooling, prevents the permanent swelling and enlarging of the fibre or particles of iron of which the heater is,

composed, thus cveiding that very objectionable f'ntnrc in box-irons,- viz, thelinhility of the heater litl'mlling too large for the box or body of the iron.

Fourth. The adiiptotion of the iron to all ports of our country, for the grated form and increased surl'iu-e of the heater adapt it to a wood, coal, coke, or charcoal fire.

The above, with other advantages, and these common to box-irons, will make this ltll'lllmt l iron. when hos long been desired by the good housewife, viz, it good, practicable, and perfect box-iron." 7

Having thus described the nature, construction, and ndvnntnges of my improvement, I wish it vlenrly understood that I do not claim broadly u. grated heater for box-irons, for Letters Patent were granted to New-e1 Cleveland and myself for a similar device; but what I do cloirn es of my invention, is-

The grated heurterf, when the bottom of some is corrugated and used in combination with the box or body of a box-iron whose inner face is corrugated substantially as herein described and for the purpose set forth.

JAMES J. JOHNSTON.

Witnesses:

Joni: Jonssroxv,

A. O. JOHNSTON. 

